... can support up 4 Remote Units; 2,Under fiber optic cable; The TETRA Fiber Optic Cellular Repeater is designed to solve problems of ... away from the BTS (Base Transceiver Station) and has fiber optic cable network underground.Main Functions:1,No more self-oscillation ... signal blind area where signal is weak or unavailable.Outdoor:Airports,tourism regions,golf course,tunnels,factories,mining districts ...